Is the Ephedrine a specific brand? Bronkaid and Primatine are the most common, and they are 25mg and 12.5mg eph sulfate.
Depending on the ephedrine source, I would recommend starting with one dose in the morning (15mg ephedrine + 200mg caffeine) and see how you feel. If you feel like you can increase the dose, add in another dose 4-6 hr. later.
As far as results go - the EC isn't going to directly yield results. It will help speed your RMR slightly, but you can't take it and expect miracles. It will help you with appetite control and energy, but you have to be eating in a deficit and be mindful of total energy expenditure to see results